“Yawning is like our bodies way of saying 15% battery left.” – Anonymous
Yawn…You might get to yawn, simply reading this word! Have you ever think why we yawn? What is the purpose of yawning? Well, the reason behind yawning has not been figured out even by scientists, till date. But, of course, some facts are known. Here, I have shared some facts about yawning, you didn’t know yet.
1. Yawning May Be A Symptom of Disease
Generally, yawning is not the first sign of anything serious. But, excessive yawning is certainly an indication of something wrong. As per the research studies of the National Institutes of Health, too much of yawning signifies a heart problem or brain problem.
2. Even A Foetus Do Yawn
You might be amazed knowing that even unborn babies can yawn. Though, the exact reason behind this fact is not known yet, but according to the report of LiveScience, it’s an indication of normal development of the baby.
3. Yawning is Contagious
Yawning really is infectious, especially, among the closest of pals. According to researchers, the closer you are to someone emotionally or genetically, the more susceptible you are to contagion.
4. Humans Are Not the Only Ones, Who Yawn
Besides human beings, several vertebrae animals, including some primates and pigs also yawn. There are several reasons why these animals yawn, like- to synchronize behaviours, to regulate temperature, as a part of courtship rituals or to assert dominance.
5. Yawning Cools Down Our Brain
In order to regulate the temperature, our body releases heat through sweat glands of the forehead, veins in the face or via skull. Yawning takes place, if body fails to discharge heat, via these methods. While yawning, following physiological changes take place in our body, which helps to regulate the temperature of brain.
- Our blood pressure and heart beat increases.
- We inhale large volume of cool air.
- Blood flow enhances due to relax-and-squeeze actions of the facial muscles.
6. The Average Yawn Lasts for 6 Seconds
Though, there is no scientific evidence, but several studies have revealed that the average yawn lasts for 6 seconds. Every individual has unique yawning habits.